We will always have very present the tragic events in New York City on September 11, 2001. Total chaos became master of the city of Manhattan and the world. The famous twin towers of the World Trade Center collapsed and no one could do anything about it. After a few years of hard reconstruction, the New World Trade Center is becoming a reality. I find it very difficult to write an article about one of the most important new buildings and representative of Ground Zero in New York and set aside the remaining architectural elements, though independent, are part of it as a whole. As was the case with the former World Trade Center, seven are the buildings that make up the New World Trade Center in New York, down, partial site plan of Lower Manhattan with the Hudson River on the left.

The five main WTC buildings, which are situated in an L shape, tucking the esplanade-Memorial-are composed of the One World Trade Center or Tower 1, formerly called the Freedom Tower, the most high and SOM design, Tower 2, designed by Norman Foster, also known as 200 Greenwich Street, Tower 3, designed by Richard Rodgers, Tower 4, designed by Pritzker Prize Fumihiko Maki, also a small museum dedicated to the victims the S11 which is between the two pools of the Memorial, which was designed by architect Daniel Libeskind also handled the Masterplanning. The new architectural ensemble is sure to become not only the new emblem of the economic recovery of the city of New York and the United States, but also a true symbol of freedom, looking to the future with great strength and optimism.

A majestic passenger terminal called World Trade Center Transportation Hub, which is situated between Tower 2 and Tower 3-design of renowned Spanish architect Santiago Calatrava, which uses the metaphor of a white dove rising wings to start flying as gesture symbolic tribute to the victims-full highlights of this exciting global architectural complex, however, the beautiful landscape of the Memorial Project was undertaken by architects Michael Arad and Peter Walker, who covered with 400 oak trees the esplanade dedicated to the victims of September 11 in which two waterfalls located on the same place where the imprint of the ancient towers, reminiscent marking historic event in tribute to the victims below, building distribution plant to street level.

The floor of the building at the start, so sharply square, except for the corners chamfered-similar and the same proportions as the old Twin Towers of the World Trade Center, has four other entries below ground with underground connections with the new metro station designed by Santiago Calatrava. The two-meter thick walls of proof screen truck bombs that are placed on the perimeter of the building at its base, reflecting the high level of security has been taken to avoid another potential catastrophe. The four facades of the One World Trade Center lead onto Vesey Street on the north, to the south Fulton Street, a public plaza on the east side where the construction of the Performing Art Center, also with access to West Street the west side, bottom, beautiful overhead image of Lower Manhattan (Lower Manhattan), with the New world Trade Center and the iconic Woolworth Building, Cass Gilbert design-Gothic style, he held the record for the tallest skyscraper in the world since 1913 until 1930, to the left of the image.

Based on the sheer volume of a cuboid of the same proportions as the old North Tower-design-Minoru Yamasaki and LERA, the building section loses height as it goes up due to lower levels of the facade triangular starting from the corners, reducing its surface will be opened or closed to the top. Visual perception abroad invites us to think that the different floors of the building will turn in his ascension, so the square that goes from the base, is finally rotated 45 degrees at the top, bottom, video of Tower 1 with explanations architect.

One of the most interesting characteristics of Tower 1 is that the height of the parapet of the roof matches the old North Tower, 417 meters, and thus as a curiosity, the volume of the new Freedom Tower has the exact measurement to fit inside. Furthermore, the structural height of the Norman Foster Tower 2 has the same height as the old South Tower, so that somehow or other the height of the old Twin Towers persists in the skyline. Also, another important fact is that the building's symbolic height of 1,776 feet (541.30 meters), coincides with the date of the year of the country's independence, which was founded on July 4, 1776. Without doubt, the recovery of historical references of postmodern architecture shown are placed here in this exciting project of City Planning.

above-sectional diagram of the One World Trade Center. The skyscraper postmodern technological period,-with a sharp division of the building into three parts, base, shaft and top-, has connections with the new underground station Calatrava which connects with no less than thirteen different subway lines. The antenna structure of the building crowning, which reaches 541.3 meters architectural body consists of a metallic lattice main sections divided in a circular ring at the bottom of housing the microfrecuencia microwaves, which makes the tower Liberty also perform an important communications function. The total height of the telecommunications antenna, which was designed in collaboration with artist Kenneth Snelson, has 124.36 meters (408 feet) from the ground to the roof. In addition, a light on the highest point of the structure of the huge antenna, turn to One World Trade Center in a lighthouse.

above west facade of the One World Trade Center. At the foot of the tower, by way of a staircase stands for rest and recreation of the workers of the building and passers-by with a circular fountain, were arranged in the vicinity of the building down, given the Fulton street pedestrian Calatrava station that simulates the anthropomorphic figure of a white dove rising wings to start flying as a symbolic gesture to honor the heroes, the background of the image. The majestic passenger terminal uses the metaphor of hands joined in prayer for the victims, and that in turn intertwined, also symbolize the figure of a white dove begins to take flight as a symbol of peace. A shiny metal panels covering the start of the One World Trade Center to the 20th floor where the wall starts curtain glimpse the silhouette of the concrete and steel superstructure formed by pillars and trusses.

The Memorial Monument makes us reflect on what happened in the beginning of the XXI century, but in turn look to the future with hope and optimism. The many oak trees that flood of nature, clean air and life at Ground Zero, created a beautiful park renewing the urban fabric of the city below, the building program.

above, we clarify the different colors of the building program. The scheme uses for each plant is divided into three distinct zones. On the ground floor lobby of the mechanical plants were located until the start of the office floors. The latter, which start from level 20, go to floor 90. At the top of the building, which also offers technical plants, a gazebo stayed three levels of observation open to the public, this, which has several restaurants, offering wonderful views of the city of New York in all directions down , type distribution plants at different heights.

The symmetry of the central core of reinforced concrete floor lies in changes as it goes up to adapt to the geometry of the façade, and that the different floors of the building section are losing in height, and thus reduce their surface well. However, plants octagonal inclined planes forming the curtain wall ranging in height decreasing its volume improve building performance against strong winds, given its modern, dynamic and changing. The eight sides of the facade will increase or decrease its surface as they rise. Thus, the smaller chamfered corners at the base of the building will increase its length as they move up, and vice versa; below, actual image building process starting from the structure and detail section of the curtain wall.

When starting the building, the building system comprises a core of reinforced concrete cores containing elevators, emergency stairs and facilities. For the envelope used a perimeter superstructure landing pier and beam or truss that reach the 20th floor, a level that coincides with the first floor office. At the base, the huge metal structure covered by a reinforced concrete diaphragm walls are interrupted only by a thin vertical stripes as windows lighting for safety in case of potential attacks. Except the lobby level of the building welcoming street level, the other plants until the start of the offices were for technical plants. The high levels of security employees in the building currently make no doubt one of the world's safest skyscraper.

above, render one of the beautiful interiors. The One World Trade Center, designed by architect David Childs,-member of the prestigious architectural firm Skidmore, Owings & Merrill LLP, with its architectural 541.3 meters high, is not only the tallest skyscraper in the City of New York 432 Park Avenue in front of residential design by Rafael Viñoly, but also the highest in the United States; below, the new skyline of the city of New York will be significantly changed with the construction of the new World Trade Center in the already not include the old Twin Towers.

Upon completion of its construction in 2014, the One World Trade Center will become, behind the Burj Khalifa in Dubai of 828 meters and the Makkah Royal Clock Tower Hotel in Saudi Arabia of 601 meters, in the third tallest skyscraper in the world . Likewise also the exclusive office building world's tallest. "The tower is an open and welcoming building that both radiates light as it fills. Our design team has achieved our goal of creating a great urban space,-a building that serves people who work in it-welcomes those who visit, and plays an integral role in the vibrant city that surrounds it", David Childs.

above ground floor in which mainly white marble lining that covers the core. Under the shower building lobby at street level, escalators lead us to a transition plan for urban transport to the station where they also have a small memorial with pictures dedicated to the victims. Numerous spaces for shopping centers are located in the lower levels below grade of the street to the station with connection.

The sustainable nature of the building makes it clear as to its careful design takes into account numerous criteria of eco-efficiency. A curtain wall glass floods the interior reflective plants daylight offices. Rainwater is recycled to the services themselves and other debris building materials destruction of the old Twin Towers were reused for the construction of Tower 1. The high security measures in the building with the strengthening of its core structure and in particular, more fire extinction, played a key role. The steel structure was coated flame retardant and fire escapes core widths were protected with reinforced concrete walls that are completely isolated from heat if possible fire. Also, all building exits are designed in an extremely wide to facilitate easy evacuation in case of possible danger.

Up, beautiful image from the esplanade of Memorial. Few fine threads of water that cushion the fall in two levels, we remember the great void left by the Twin Towers and the victims of the attack with their names engraved on the walls of each stamp. The avant-garde skyscrapers, which is situated in the northwest corner of the New World Trade Center, is inspired by the former Twin Towers but also on the Washington Monument, a white monolith located in the city of Washington DC, which was built in honor the First President of the United States George Washington (1732-1799), revolutionary leader who had won the war the British army for the country's independence.

I wanted to finish this emotional story with a beautiful night skyline of the New World Trade Center in New York, as it would be over-, which contains the famous Statue of Liberty (Liberty Enlightening the World) first, and Empire State Building and the Chrysler Building to the left, in the background, true emblems of the city, Art Deco style that inspires dreams and greatly dignifies major urban regeneration project that is being carried out at present in Great Apple, which has led to the great change historical, architectural, social and global, that has occurred in the city of New York in recent years.